1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3616f4fe1df2df383819ad75119b31ea9eced009ac4478bf14962f96f0ed19f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a88179d1-e708-4aeb-b43d-e8d684b8be91.json and https://artists.proofprofile.net/proofs/artist/a88179d1-e708-4aeb-b43d-e8d684b8be91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2cf20aef56b650b678210e007915ad416daf21e2bce35af34d91873b3d4e48. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IND832304187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35ea653185ed9a9c7dbdb5ff4b46557c3edda215f81a1e0cd73e0704b04a280. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG2368570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044d3fa9593f7a122b7adfc4e6d59f930840a7a3d459a229008c0005b08a0707. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IND832401812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7a32768a00aa4e4d920b5c7cf42498e92de0e50da6936eadb7452349f8dba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IND832402091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3ba544532330dfe68738c3532f719dd09ab071e189f703fd7c7e14439b33c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212410226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194e855327dac9cfc80384872bf8b86dad5b23fe072ce7efb5770050f7099671. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212410286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a66b8301482efc4c7d9103cc516d84cfc4f0ebcc1be33a23520028df3b0b80. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212410287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd3b0a41bc30f8acfdc0a1c2be27356e8d994e3a3fa0b171329617bfc69e619. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212410553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d56d6413f9956fd50965cc79e065a43262e9ddf52a57019a98f8e955644c0b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212410548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc131a633cfbf2fa94c52e2cfa8ae14d405d8d81f5e8b09d00d33840e61447633. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212410556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b3e2782657940aa3da8b4f775dc43212ab2f3a0fee123c1b7cb6c3e08f7335. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212411827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cae8c439e59edfa4b7f13e58a55f374aa0f451686c4f855496081b851b038e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212413673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0632f873391b49e50e57dc3e5edc25913e6ca0ef1d096325b3edd3fa8eeab2d0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212414057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4d7a62d716cecb2a5f17fa053ad155905bf2eb885af4ebce4f5ee7d27d039f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212414019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f4db7fd69488be36f1ab67325828857f9b518034c6236324984ae7be9319a. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212414099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f83a2731e2208e4a00f3b4bacdf07c85c21655a616270ab6e408308b9c4cea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212414748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf7d4f86b99ad6147cd59494804fbc59134fe0b179928988cf9de2806bb7d3f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING212516923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a699c8a33745ff433a70f4bf382ac899957139f10dcb58eeaabbb332e0a810. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INN242511472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60c37015f3ef421630c7cadb5ada426fab76cdd11e44e9d49d070e1e314f861. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INN242527408.